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Finding the Fourth Proportional to 765,776.88, 1,148,802.12 and 260,311.30

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Solution

The fourth proportional to 765,776.88, 1,148,802.12 and 260,311.30 is: 390,513.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,776.88 : 1,148,802.12 = 260,311.30 : x
  2. Step 2: Convert to fraction form
    765,776.88/1,148,802.12 = 260,311.30/x
  3. Step 3: Cross multiply
    765,776.88x = 1,148,802.12 × 260,311.30
  4. Step 4: Simplify right side
    765,776.88x = 299,046,170,427.95
  5. Step 5: Solve for x
    x = 299,046,170,427.95/765,776.88
  6. Step 6: Final answer
    x = 390,513.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.